Besides, they are harder to decorate!
I'm biding my time for a plain rectangular 5.5 or if I Can get a used 10gal.
Would rather divide that for two boys than use that big unweildy thing. (I mean have you ever tried to empty it? I keep soaking the back splash when emptying it).

Back to the main point, they don't like height, or at least it's not as comfortable for them.

Thanks for the opinions so far! I didn't the know I was thinking of was so tall.

I wonder why Petco doesn't have small tanks like these? Least mine doesn't, they just have them fancy tanks that are like 4 gallons and cost $120.

Your in the wrong isle.

Edit: in both of my local Petco's the cheap little tanks are in a different isle then the larger nicer tanks are.. & THen normally the tanks like the fluval chi & edge are somewhere else.. They dont want you looking at a lesser model when your there shopping..